I haven't shot one buy my old Army buddy has, and if he says it is his favorite rifle that means something as he has dozens of rifles of all types. He also has a .223 version which he gave to one of his kids.
These are his comments to me: No, mine uses a regular rotary mag. I ordered the 308 with the rotary mag too. Ruger has three different versions of that rifle. I think they rushed it to market before they figured out which magazine type they wanted to use. They have versions that use the rotary magazine, AR magazine, and an AI style magazine. I think there are disassembly and trigger adjustment issues with both the AI & AR mags. I saw no benefit to having those type of magazines. I like the detachable flush-fit rotary magazine just fine and don’t think for my application I would ever get more than one shot anyway.
Right now it is my favorite rifle. It is scary accurate, lightweight, compact and has negligible recoil.